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论文类型：会议论文

发表时间：2017-08-20

卷号：2017-August

摘要：A progressive damage model based on extended Hashin criteria and cohesive model was developed to investigate the position effect of designed delamination on compressive behavior of CFRP laminate in thick direction. Designed delamination was placed in the CFRP laminate with different depths, which were varying from 1/20 to 10/20 of its thickness by considering the symmetry of laminate. Buckling mode, intralaminar failure, and the progress of designed delamination were obtained with the developed progressive damage model. As the designed delamination was embedded at depth position of 1/20, both local-buckling and global-buckling took place and the maximum local-buckling displacement reached 0.35 mm. While, only global-buckling occurred with designed delamination embedded at deeper position. Fiber tension and matrix crack usually generated at the outside of buckling laminate with only global-buckling while fiber compression and matrix crush inside. These four failure modes could be distinguished at local-buckling area of laminate which contained both local-buckling and global-buckling. The fiber direction of adjacent layers where designed delamination located was the predominant factor that affected the strength of laminate. Delamination propagated from the edge of designed delamination to free side with superficial designed delamination while the propagating path was opposite when the designed delamination was deeper. © 2017 International Committee on Composite Materials. All rights reserved.